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等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824022422409456.png中,已知 http://picflow.koolearn.com/upload/papers/20140824/20140824022422425460.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824022422440484.png,使得 http://picflow.koolearn.com/upload/papers/20140824/20140824022422456464.png的最小正整数n为   (  )

发布时间:2021-09-28

A.7

B.8

C.9

D.10

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